Driver Side Door Key Lock And Unlock Switch Circuit: Procedure

1. Connect Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the tester on.
4. Enter the following menus: Body Electrical / Main Body / Data List.
5. Read the Data List according to the display on the tester.
   MAIN BODY:
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Dor Key SW-Lock	Driver door lock/unlock switch lock signal (key-linked lock switch) /ON or OFF	ON: Driver side door key cylinder is turned to LOCK OFF: Driver side door key cylinder is not turned to LOCK	-
   Dor Key SW-Ulck	Driver door lock/unlock switch unlock signal (key-linked unlock switch) /ON or OFF	ON: Driver side door key cylinder is turned to UNLOCK OFF: Driver side door key cylinder is not turned to UNLOCK	-

   OK

   The display is as specified in the normal condition column.

NG → See step   2 

OK → PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

1. Remove the front door lock assembly LH.
   Fig 1: Inspecting Front Door Lock Assembly (Door Key Lock And Unlock Switch)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   7 - 9	ON (Door lock set to LOCK)	Below 1 Ω
   7 - 9 7 - 10	OFF (Free)	10 kΩ or higher
   7 - 10	ON (Door lock set to UNLOCK)	Below 1 Ω

NG → REPLACE FRONT DOOR LOCK ASSEMBLY 

OK: Go to next step 

1. Disconnect the front door lock assembly LH connector.
   Fig 2: Checking Wire Harness (Front Door Lock Assembly - Main Body ECU)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the main body ECU connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection (Symbols)	Condition	Specified Condition
   I2-9 (L) - DK-16	Always	Below 1 Ω
   I2-10 (UL) - E61-10 (UL3)	Always	Below 1 Ω
   I2-7 (E) - Body ground	Always	Below 1 Ω
   I2-9 (L) - Body ground	Always	10 kΩ or higher
   I2-10 (UL) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → REPLACE MAIN BODY ECU